I mean sure, there’s obviously some degree of distinction. But there’s enough variety and overlap between groups that it’s hard to claim there’s genetic evidence for race.

No one is saying the socially constructed idea of race is written in genetics. Just that you can detect a measurable difference between groups of people. This statistically trend for certain groups to have certain genetics can be used to understand the ways in which cultures interacted with eachother. We’ve gotten good evidence for entire conflicts lost to history by comparing mitochondrial DNA and the Y chromosome of certain ethnic groups.

Genetics and “race” also aren’t equivalent to ethnicity, especially in a multiracial ethnoreligious group. My father is of Jewish descent but my mother is not and I wasn’t really raised as a Jew. If I wanted to be considered Jewish, I’d need to put in the effort of joining a community and possibly converting, depending on how conservative the sect is.

I don’t disagree here. I wasn’t stating that genetics is all you need to belong in a certain group. Just that genetic evidence points towards Jews indeed being a more distinct lineage of people as opposed to Christianity.